Abstract: A security system for a building uses the telephone system. Telephone receivers are located in various rooms in the building and linked through a telephone exchange. Persons that live or work in the building are provided with wireless alarm transmitters. Wireless receivers are located in the building, each coupled to one of the telephone receivers. Each wireless receiver, when receiving an alarm signal from one of the transmitters, initiates a call to the telephone exchange in response. The wireless receiver message will identify the individual associated with the particular transmitter and provide the location of the receiver that received the alarm signal.

Abstract: An improved vehicle intruder alarm system includes a method of automatically arming an alarm system. When arming the alarm system by remote control the vehicle windows can be raised and the vehicle headlights automatically turned on by remote control. When entering a vechicle door while the system is armed, a low warning tone is produced for an entry delay time. The warning tone increases with time. The processor for the alarm senses the magnitude and rate of impacts or motions of the vehicle. Short warnings are produced when the magnitude and rate are above a threshold.

Abstract: An improved vehicle intruder alarm system includes a method of automatically arming an alarm system. When arming the alarm system by remote control the vehicle windows can be raised and the vehicle headlights automatically turned on by remote control. When entering a vehicle door while the system is armed, a low warning tone is produced for an entry delay time. The warning tone increases with time. The processor for the alarm senses the magnitude and rate of impacts or motions of the vehicle. Short warnings are produced when the magnitude and rate are above a threshold.

Abstract: A trailer theft and burglary alarm system utilizes the releasable electrical connection between a vehicle light circuit and the trailer brake light circuit to warn the operator that the releasable electrical connection is being tampered with. A signal producing apparatus continuously monitors the resistance of the trailer brake light circuit and produces a signal corresponding thereto. When the vehicle is to be left unattended, the signal is recorded. Thereafter, if the releasable connection is disconnected, the signal produced will differ from the original signal. This difference is recognized and the alarm sounds. Portal sensors can be provided that will produce a change in either the resistance or capacitance sensed by the signal producing apparatus if a portal to the trailer is disturbed. This change in either resistance or capacitance will also alter the signal produced, and trigger the alarm.

Abstract: A data receiver providing an intelligent interface for a hand held computerized data entry terminal to communicate over telephone lines with a host computer. The data receiver has multiple microprocessor control receiver line cards connected to telephone lines and interconnected to interface with the host computer. Each line card includes a system program in a nonvolatile area of memory and a customer application program in volatile area of memory. The data receiver answers the telephone, checks for errors and provides progress tones over the telephone line. When connected to a data entry terminal, the data receiver sets the baud rate, determines the line card protocol, reformats the data in accordance with the customer specifications and hands the data off to the host computer. A remote service computer may be connected to each line card to update the customer application program in the data receiver as well as perform diagnostic and testing routines over the telephone line.

Abstract: A portable handheld battery operated telecommunications terminal (10) is acoustically coupled to a telephone hand set for the transmission and reception of alphanumeric information over ordinary telephone lines. A standard typewriter ASCII keyboard (34) enables the encoding of messages for transmission on a character by character basis (Baudot code) or the entire message to a second communications terminal (10) with the same transmission protocol. A visual display (32) provides a display of data for editing the encoded message prior to transmission and for display of a message received from a second communications terminal (10). A microprocessor (50) is programmed by processor instructions stored in EPROMs (66) and (68) for controlling operation of the communications terminal (10) from entries from the keyboard (34).